Bed-adjusting mechanism for stamping presses



May 13, 1930. B. J. LINDGREN al Filed Dec.

4 Q W 7. I M 3 Patented May 13, 1930 UNITED- STA ES "Q F QE P intone. .LINDGREN; on BUFFALO, new yonniassrsnon' To NIAGARA MACHlNE: &

TOOL wosxs, or BUFFALO, NEW roan, A oonron-ar onionn w on BED-ADJUSTING MnoriANrsM F3031 sushi-crime 'rnnssn sf Original application filed December This invention relates 'to a beds-awning mechanlsm for sheet metal workmgpresses such as sheet metal stamping pressesand has for its object the provision of a mechanism 5 for this purpose which permits of easily and conveniently adjusting the bed either while the press is at rest or in operation and which Fig. 3 is a verticallongitudina-l section. on

' anenlargedscale; taken, on line 3-3, The press, shown in the'drawing's isjprie marily intended fornotching and blanking operations on Sheet m'etalin conjunction with i an automatic mechanism arranged at afixed level and'operating to feed the metal to the notching or blanking press. It is to be understood however that this bed adjusting mechanism can also be used witha roll feed mechanism'which operates at a fixed level and therefore requires adjustment'of the die to of one capable of usein connection with this invention. As thereshowmthe press comprises a main frame 10 whichis mountedupon a base frame 11 andprovided with a lower bed meet this level whenever the latter is resharp be of various drawingsis, therefore, to be taken as typical or table 12 which is adapted to support the 24, 1925, Serial jNoh 27,447; fi harmed aid this s p icaa iua .Au gnst Q83192712f5ria1N0i211l400.

die 1 or lowerfforming member, whereby the article-is adaptedto be shapedor punched,

- and an upper vertical guideWayl-3 in which a slide '14 moves vertically and is adapted to carryf a! punch or upper forming member adaptedto cooperate with the lower forming member or diein the production of articles to v be stamped or punched. This upperslide 14 is reciprocated vertically inits guideway by a horizontal shaft journaledtransversely in a bearing on the upper part'ofthe main frame andprovided with a crank or wrist, which is I connected with the slide 14 by means of a pitman: or connecting rod sothata vertical reciproc'ating motion is imparted tothe punch orupper die member during the rotary movement, of the crank shaft in the usual-and wellknown manner in this type of stampi or P hing presses. V

In the present instance the blank or sheet tobecut'or stamped is adjustably mounted by intermediate means on the bed or table 12 for. the. purpose of accurately fitting the die to the punch when setting upthe press and also for taking up wear. The preferred form ofthese ad usting means is as follows Movable vertically on the lower bed, or table 12 isa lower slide having an upper head 19adaptedto carry the die and a lower'shank 20 depending from the head and guided in vertical ways 21 arrange on opposite sides of an opening 22 in the bed 12. At its lower end this shank 20 is engagedby vertically Y swinging lifting lever-23 which' is f pivoted at its rear end on the main frame bymeans of a transverse horizo'ntalpin 24. The front end of the lifting lever23 is provided with a longitudinal notch-or slot 25 which receives the lower-flat sided portion 26 of an upright lifting rod"275 saidfiat sided portion 26 engaging with the sides of the notch 25 so as to prevent this rod from turning in the lever'23,

but still permitting an oscillating movement 7 of" the rod. and lever relatively to each other in a verticalplanelengthwise'of the machine.

convex or roun'ded side 29 ofrth e'lifting' lever and its upper end pass'esthrou'gh' a vertical At'its lowerend the liftingrodis provided with a head 28 which bears against the lower which is detachably secure'd'to the front side" 'bed'12. This upper end of the lifting rod v is externally screw-threaded and receives an adjustingscrew nut 31 which rests ontop of the adjacent part of the bed 12and is'provided on the lowerpart of its periphery. with a worm ri1n :orwheel32. Meshin'giwith the ings 35, 35 being formed on a bracket-:37

of the bed 12and thebearing 36 *being arranged on'ahanger 38" which is detachably 7 secured to the front side of the bed '12, adj a-xmeans for "adjustably mounting a lowerdie 1 or tool relativeto the bedcomprising alower;

cent to one corner thereof. The worm 33 'is confinedbetweenfthebearings 35, 35 so as to be held againstlongitudinal movement'and rotation of this worm. is effected'by means of 5 a-handle or wheel 39 secured to the outer end of the shaft34, as shown in Figures 1 and 2..

1 Upon turning the worm 33 by meansof V handle 39, the worm wheel 32 and the screw nut 31 formed thereon are turned ab outthe lifting rod 27,; whereby the latter is raised or lowered, depending upon which way the shaft 34 is turned Upon raising and loweringthe rod 27, the die lnounted on the lower slide 19, 20, is adjusted accordinglyjthro'ugh the medium ofthe lifting lever 23.. The weight of these parts operates to keep the screw nut31 andfworm wheel '32 inengagement" with the 7 upper side of theifr'ontpartofthelbed 1 2,s'o'

" that no separate means are required for keeping the parts in a normal position. By means of this mechalnsm, the lower slide may be raised or lowered for the purpose of accurately adjusting the lower forming member or die to the fixedflevel of the'feed when setting up the press, and also when it becomes necessary to compensate for wear,-

andafter these parts areadjusted they are reliably held in placewithout requiring any separate fastening for this; purpose. a Moreover,-this means ofadjusting thelower cut- 7 ting member or die permits of effecting this 2 A sheet metal and guided by the bed, and means for adjusting said die vertically relative to said bed comprising a 'lifting lever supporting said lowerslide, a lifting rod connected at its lower end with said lifting lever, ascrew nut engaging with the upperend'of said rod and resting on said bed, a worm wheel arranged on said screw nut, a Worm meshing with;. said Jworm wheel-andiheld against lengthwise. movement, and. azishaft carrying,

said worm and journaled in hearings on the "bed iand provided with a handle. I 3. Ai'sl1eet, 1netalworking press having a frarne, 'ajbed arranged on theframe-{and I slide adapted to' carry said dieand provided 'withfa'n l upper head and a. shank depending from said head, s aid bed being provided with i an opening whichireceives' said shanlriand the opposite sides of said opening being pro-y videdj with guideways;inwhichthe shank is guided, a vertically; swinging lifting lever engaging the central part of its upper side with the lower endof the shank and having its rear end pivotallye'connected with the frame and its front end provided with a longitudinal slot, an upright lifting rod having a threaded upper end, a flat sided lower part engaging with the slot inlsaid'lever and a head at its lower end engaging with the lower side of the lifting lever, said bed being provided ;wit h an opening Twhich receives the up per'en'd of saidrod, a screw'nut engaging the threaded end ofsai'drod andresting' on the bedandhaying aworm wheel, a wormmesh- :ingwith said worm wheel, ashaft carrying said worm, and bearings which are a'rrangecjl on said bed on opposite "sides of saidworni and in which said shaft'is journaled.

In testimony whereof'I hereby aflix mysignature,

' BRORIJ. LINDGREN.

1. A sheet metal working press having a 7 bed, and means for adjustably: mounting a lower die ortool relative to the bed comprising alo wer slide adapted tocarry said die and guided by the bed, andmeansfor adjusting said dieyerticallyrelativeto said bed comprising a lifting lever supporting said lower slide, a 'llftlIlg lOd connected at its lower end with said lifting lever, and a screwhnut-engaging with the upper endof said; rod and resting on said bed.

bed, and means {for 5 adj ustably mounting ;a

working, press having a 7 7 7:, Hog. 

